Hwy 31 & Greenhouse Rd, Ione, WA 99139

The former Airport Kwik Stop is now the Airport General Store and no longer sells gasoline or diesel.
Please click on the photo for a larger view


The Airport Kwik Stop site begins west of Highway 31 and north of Greenhouse Road and extends generally east and southeast toward the Pend Oreille River. The site was formerly a convenience store that sold gasoline and diesel. The site includes the former Airport Kwik Stop, the former Cabin Grill, and vacant properties north, south and east of the Cabin Grill.

The Airport Kwik Stop building is now the Airport General Store and no longer sells gasoline or diesel. The Cabin Grill is a private residence. 

In 1994, underground storage tanks at the Airport Kwik Stop were removed, and above ground storage tanks were used to store fuel. In 2008, a pipe connection leaked under the premium gas dispenser, which caused gasoline to spray inside the dispenser. 

In 2010 and 2011, soil and groundwater samples taken at the site showed petroleum-related contaminants exceeded state standards and posed a threat to human health and the environment. Drinking water wells in the vicinity have been impacted.


Volatile organic compounds, benzene, tolueneethylbenzene and xylenes, and gasoline-range petroleum hydrocarbons are in soil and groundwater.


The Washington Department of Ecology (Ecology) is leading and funding cleanup at the Airport Kwik Stop site because the former owners/operators cannot afford it.

In 2012, Ecology proposed and the public approved (read Ecology’s responses to public comments) a work plan for investigating the extent and locations of contamination and evaluating cleanup options, a process resulting in a feasibility study in 2013.

In early 2012, as part of the investigation, Ecology sampled the drinking water wells of six residences that were potentially impacted by the contaminated groundwater plume, which had shifted directions. Since then, we have installed carbon filters on residential water wells showing contamination.

Ecology installed 10 groundwater monitoring wells at a variety of potentially impacted locations in 2012. Three soil vapor extraction wells were also installed to test efficiency for treating petroleum-contaminated unsaturated soil at the Airport Kwik Stop. Two air-sparge wells were added to evaluate treatment of contamination in saturated soil.

By mid-2012, Ecology shared the results of testing the soil vapor extraction system and proposed to use the technology to reduce contamination while the remedial investigation and feasibility study process continued. We responded to public comments on this interim cleanup action.

In late 2013, the remedial investigation and feasibility study reports were made available for public comment (“View Electronic Documents” at right for remedial investigation supporting information). Ecology responded to public comments on the reports in 2014.

In mid-2014, Ecology proposed additional work to clean up petroleum contamination in soil and groundwater about 35 feet below ground at the former Cabin Grill property. We responded to public comments on the plan.

In 2015, Ecology conducted a pilot test of a new, combined air sparge and soil vapor extraction system near the former Cabin Grill to determine if full-scale treatment system is needed for the site.

Based on the results of the combined air sparge and vapor extraction pilot test, air sparging was added to the remediation system at the Airport Kwik Stop site in 2016. Depending on the performance of the initial five air sparge wells, additional air sparge wells may be installed.

Ecology held a comment period May 22 - June 5, 2017, on a proposed groundwater treatment plan to reduce petroleum contamination. We didn't receive any comments. You can learn more in the  fact sheet that was delivered to nearby residents and was available at the Airport General Store.

Following the comment period, contractors began injecting bioremediation amendments into groundwater to supply bacteria that increase the growth of microbes that consume petroleum. Increased microbial activity decreases the amount of petroleum. The injections also provide nutrients, such as nitrogen, phosphorus, and potassium, that also increase microbial growth and activity.

When the final cleanup plan is drafted, it will be available for public review and comment. This plan will select the best cleanup methods from the investigations and treatment system tests.


Map showing site location as Pend Oreille County, WA SITE INFORMATION


View Electronic Documents

Cleanup Site Details Report

Facility Site ID: # 32584416

Cleanup Site ID: 4203

Ione, Pend Oreille County

Status: Cleanup Started   Get definitions of Status terminology

Justin Rice
Site Manager
(509) 329-3516

Erika Beresovoy
Public Involvement Coordinator
(509) 329-3546

Document Repositories:

Eastern Regional Office
N 4601 Monroe St
Spokane, 99205-1265

Ione Public Library
200 Blackwell, Suite 1
Ione, 99139